[Bug 1654480]

Alex Korchemniy alex.korchemniy at gmail.com
Fri Dec 6 07:12:40 UTC 2019


I started digging into the SoundTouch library and confirmed my
suspicion. https://hg.mozilla.org/mozilla-
central/file/tip/media/libsoundtouch/src/TDStretch.cpp#l637

Author says it's implemented using "WSOLA-like method". Waveform-
similarity-based synchronized overlap-add. Maybe based on this paper
from 1993? https://www.semanticscholar.org/paper/An-overlap-add-
technique-based-on-waveform-(WSOLA)-Verhelst-
Roelands/d94abd77e52a56c425e4b86e6c7d692583ea406d

Perhaps it doesn't scale well past 2x.

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https://bugs.launchpad.net/bugs/1654480

Title:
  HTML5 sound choppy when played at 4x

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